<template>
  <!-- 头部 -->
  <header class="header">
    <!-- 头部的第一行 -->
    <div class="top">
      <div class="container">
        <div class="loginList">
          <p>尚品汇欢迎您！</p>

          <p v-if="!userName">
            <span>请</span>
            <router-link to="/login">登录</router-link>
            <router-link to="/register" class="register">免费注册</router-link>
          </p>
          <p v-else>
            <a>{{ userName }}</a>
            <a class="register" @click="logout">退出登录</a>
          </p>
        </div>
        <div class="typeList">
          <router-link to="/center/myorder">我的订单</router-link>
          <router-link to="/shopcart">我的购物车</router-link>
          <a href="#">我的尚品汇</a>
          <a href="#">尚品汇会员</a>
          <a href="#">企业采购</a>
          <a href="#">关注尚品汇</a>
          <a href="#">合作招商</a>
          <a href="#">商家后台</a>
        </div>
      </div>
    </div>
    <!--头部第二行 搜索区域-->
    <div class="bottom">
      <h1 class="logoArea">
        <router-link class="logo" to="/home">
          <img src="~assets/images/home/logo.png" alt=""/>
        </router-link>
      </h1>
      <div class="searchArea">
        <form action="###" class="searchForm">
          <input
              type="text"
              id="autocomplete"
              class="input-error input-xxlarge"
              v-model="keyword"
          />
          <button class="sui-btn btn-xlarge btn-danger"
                  type="button"
                  @click="goSearch">
            搜索
          </button>
        </form>
      </div>
    </div>
  </header>

</template>

<script>

export default {
  name: 'Header',
  data() {
    return {
      keyword: '',
    }
  },
  computed: {
    userName() {
      return this.$store.state.user.userInfo.name
    }
  },
  methods: {
    goSearch() {
      //路由传参数
      //第一种: 字符串形式
      // this.$router.push('/search/' + this.keyword + '?k=' + this.keyword.toUpperCase())
      //第二种:模板字符串
      // this.$router.push(`/search/${this.keyword}?k=${this.keyword.toUpperCase()}`)
      //第三种:对象
      if (this.$route.query) {
        let location = {
          name: 'search',
          params: {keyword: this.keyword || undefined},
        }
        location.query = this.$route.query
        this.$router.push(location)
      }


      /*-------------------面试题-------------------------*/
      //2: 如何指定params参数可传可不传
      //如果路由要求传递prams参数, 但是你就不传params参数, 发现一件事情, URL会出问题
      //答: 在index.js 在配置路由的时候,在占位的后面加一个 问号? [params可传可不传]
      // this.$router.push({name: 'search', query: {k: this.keyword.toUpperCase()}})

      //3: params参数可以传递也可以不传递, 但如果传递是空串, 如何解决?
      //答: 使用undefined解决: params参数可以传递、不传递(空的字符串)
      // this.$router.push({name: 'search', params: {keyword: '' || undefined}, query: {k: this.keyword.toUpperCase()}})

      // this.$router.push({name: 'search', params: {keyword: this.keyword,}, query: {k: this.keyword.toUpperCase()}},)

    },
    //退出登录
    async logout() {
      try {
        //1、发请求， 清理一些数据 token
        //2、清除项目当中的数据 【userInfo token】
        await this.$store.dispatch('userLogout');
        this.$router.push('/home')
      } catch (e) {
        alert(e.message)
      }
    }
  },
  mounted() {
    this.$bus.$on('clear', () => {
      this.keyword = ''
    })
  }
};
</script>


<style lang="less">
.header {
  & > .top {
    background-color: #eaeaea;
    height: 30px;
    line-height: 30px;

    .container {
      width: 1200px;
      margin: 0 auto;
      overflow: hidden;

      .loginList {
        float: left;

        p {
          float: left;
          margin-right: 10px;

          .register {
            border-left: 1px solid #b3aeae;
            padding: 0 5px;
            margin-left: 5px;
          }
        }
      }

      .typeList {
        float: right;

        a {
          padding: 0 10px;

          & + a {
            border-left: 1px solid #b3aeae;
          }
        }
      }
    }
  }

  & > .bottom {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;

    .logoArea {
      float: left;

      .logo {
        img {
          width: 175px;
          margin: 25px 45px;
        }
      }
    }

    .searchArea {
      float: right;
      margin-top: 35px;

      .searchForm {
        overflow: hidden;

        input {
          box-sizing: border-box;
          width: 490px;
          height: 32px;
          padding: 0px 4px;
          border: 2px solid #ea4a36;
          float: left;

          &:focus {
            outline: none;
          }
        }

        button {
          height: 32px;
          width: 68px;
          background-color: #ea4a36;
          border: none;
          color: #fff;
          float: left;
          cursor: pointer;

          &:focus {
            outline: none;
          }
        }
      }
    }
  }
}
</style>